Section (5) group
group — user group file
/etc/group file is a
text file that defines the groups on the system. There is one
entry per line, with the following format:
The fields are as follows:
the name of the group.
the (encrypted) group password. If this field is empty, no password is needed.
the numeric group ID.
a list of the usernames that are members of this group, separated by commas.
As the 4.2BSD initgroups(3) man page
says: no one seems to keep
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Copyright (c) 1993 Michael Haardt (michaelmoria.de),
Fri Apr 2 11:32:09 MET DST 1993
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Modified Sat Jul 24 17:06:03 1993 by Rik Faith (faithcs.unc.edu)